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Dear Mr. Schneider,
Thank you for posting your request on History Hub!
We searched the series Alphabetical Files, 1946 - 5/1948 in RG 337 but were unable to determine if the information you seek is located in these files since the contents are arranged by an alphanumeric filing system that was unique to the branch. To personally review all 8 boxes (or approximately 12,000 pages), please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org and arrange for a visit.
We hope this is helpful.